Solvation Structure Design for Aqueous Zn Metal Batteries
University of Maryland, College Park · Brookhaven National Laboratory
Abstract
Aqueous Zn batteries are promising energy storage devices for large-scale energy-storage due to low cost and high energy density. However, their lifespan is limited by the water decomposition and Zn dendrite growth. Here, we suppress water reduction and Zn dendrite growth in dilute aqueous electrolyte by adding dimethyl sulfoxide (DMSO) into ZnCl2–H2O, in which DMSO replaces the H2O in Zn2+ solvation sheath due to a higher Gutmann donor number (29.8) of DMSO than that (18) of H2O. The preferential solvation of DMSO with Zn2+ and strong H2O–DMSO interaction inhibit the decomposition of solvated H2O. In addition, the decomposition of solvated DMSO forms Zn12(SO4)3Cl3(OH)15·5H2O, ZnSO3, and ZnS enriched-solid…
Citation impact
- FWCI
- 66.27
- Percentile
- 100%
- References
- 30
Authors
9Topics & keywords
- Chemistry
- Solvation
- Aqueous solution
- Metal
- Inorganic chemistry
- Molecule
- Organic chemistry
- Affordable and clean energy